A flat ceramic film extrusion molding die

Abstract

The utility model provides a flat ceramic membrane extrusion molding die, which belongs to the technical field of ceramic membrane production. The flat ceramic membrane extrusion molding die comprises a bottom mold, a concave mold, a core mold and a molding column. The concave mold is provided with a first waist-shaped hole and a second waist-shaped hole that are continuously connected along its thickness direction. The core mold is cooperatively arranged in the combined cavity of the first waist-shaped hole and the second waist-shaped hole, and is clamped by the bottom mold and the concave mold. The core mold is provided with a first flow channel and a second flow channel that are continuously connected along its own thickness direction. A plurality of the molding columns are arranged in a straight line in the combined cavity of the first flow channel and the second flow channel. The flat ceramic membrane extrusion molding die is designed with a replaceable core mold, which can be directly replaced after being worn out due to long-term contact with the mud material. The core mold and the concave mold can be replaced later according to actual use, and do not need to be replaced as a whole, which is relatively lower in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic film production, in particular to a flat ceramic film extrusion molding die. Background Art

[0002] The production process of flat ceramic membrane is to add ceramic powder to binder, pore former, sintering aid and water to make mud, and then pass the mud through the extrusion equipment through the flat ceramic membrane extrusion die to make a hollow mud plate of a certain size, and finally sinter, coat and sinter. The size of the mud blank (the thickness of both sides of the hollow mud plate) and the surface flatness of the mud have a great influence on the quality of subsequent products during the extrusion process. The existing extrusion die is made of die steel. During use, the ceramic powder of the ceramic mud has a high hardness, so the extrusion die wears a lot. Under normal circumstances, a new die will be severely worn after extruding about 5,000 products, resulting in defects such as increased thickness of the mud blank and severe scratches on the product surface. However, the cost of replacing the extrusion die as a whole is high. Utility Model Content

[0003] The utility model provides a flat ceramic film extrusion molding die to solve the problem of high replacement cost of existing extrusion dies. The flat ceramic film extrusion molding die is designed with a replaceable core die, which can be directly replaced after being worn out by long-term contact with the clay material. The core die and the concave die can be replaced later according to actual use, without having to replace the entire die, which is relatively cheaper.

[0004] The technical solution adopted by the utility model is:

[0005] A flat ceramic film extrusion molding die, comprising:

[0006] A bottom mold, wherein a plurality of feed holes are provided on the bottom mold along the thickness direction thereof; the plurality of feed holes are arranged in a straight line and divided into 2n rows, where n is an integer greater than or equal to 1;

[0007] A concave mold, wherein the concave mold is detachably connected to the bottom mold; the concave mold is provided with a first waist-shaped hole and a second waist-shaped hole which are continuously connected along the thickness direction thereof; the axial center directions of the first waist-shaped hole and the second waist-shaped hole and the through direction of the feed hole coincide with each other; the length and width of the first waist-shaped hole are respectively greater than the length and width of the second waist-shaped hole, and the first waist-shaped hole is adjacent to the bottom mold;

[0008] A core mold, the core mold is arranged in a combined cavity of the first waist-shaped hole and the second waist-shaped hole, and is clamped by the bottom mold and the concave mold; the core mold is provided with a first flow channel and a second flow channel that are continuously connected along its own thickness direction; the first flow channel is adjacent to the bottom mold, and the length and width of the inlet end thereof are greater than the length and width of the area where the feed hole is located; the length and width of the outlet end of the second flow channel are less than or equal to the width and thickness of the flat ceramic membrane;

[0009] Molding columns, several of which are arranged in a straight line in the combined cavity of the first flow channel and the second flow channel; one end of the molding column in the axial length direction is connected to the surface of one side of the bottom mold between the four adjacent feed holes in the two middle rows of feed holes; the gaps between the molding columns and between the outer walls of the molding columns and the inner walls of the first flow channel and the second flow channel are the flow molding channels of the mud in the flat ceramic membrane extrusion molding mold.

[0010] Furthermore, n is 1 or 2.

[0011] Furthermore, the distances between adjacent forming columns are equal.

[0012] Furthermore, the molding column is in the shape of a quadrangular prism as a whole, and the four edge regions in the length direction thereof overlap with the through regions of the four feed holes.

[0013] Furthermore, one end of the forming column connected to the bottom mold is provided with four guide grooves along its own axial length direction; the four guide grooves correspond to the four feed holes respectively; and the inner wall surface of the guide groove is flush with the inner wall surface of the feed hole.

[0014] Furthermore, the corners of the inner walls of the first flow channel and the second flow channel are both rounded.

[0015] Furthermore, the total opening area of ​​the feed holes accounts for 60-80% of the area of ​​the inlet end of the first flow channel projected onto the bottom mold along the axial length direction of the molding column.

[0016] Furthermore, the ratio of the axial length of the molding column to the thickness of the core mold is 2:3~1:1.

[0017] Furthermore, matching positioning pins are provided between the bottom mold and the concave mold.

[0018] The beneficial effects of the utility model are:

[0019] The flat ceramic film extrusion molding die in the utility model is designed with a replaceable core mold, which can be directly replaced after being worn out by long-term contact with mud. The replacement of the core mold and the concave mold part can be postponed according to actual use conditions, and there is no need to replace the entire part, which is relatively lower in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 Schematic diagram of the three-dimensional structure of the flat ceramic membrane extrusion molding die in the embodiment Figure 1 .

[0022] Figure 2 Schematic diagram of the three-dimensional structure of the flat ceramic membrane extrusion molding die in the embodiment Figure 2 .

[0023] Figure 3 It is the front view of the flat ceramic membrane extrusion molding die in the embodiment.

[0024] Figure 4 for Figure 3 AA section view.

[0025] Figure 5 Schematic diagram of the exploded structure of the flat ceramic membrane extrusion molding die in the embodiment.

[0026] Figure 6 for Figure 5 A partial enlarged schematic diagram of point B in the middle. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0029] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0030] A flat ceramic film extrusion molding die, its structure is as shown in the attached Figures 1 to 3 The flat ceramic film extrusion molding die comprises a bottom die 100 and a concave die 200 .

[0031] The bottom mold 100 is in the shape of a rectangular block and is made of hard metal materials such as alloy steel. A plurality of feed holes 110 are provided on the bottom mold 100 along its thickness direction. The plurality of feed holes 110 are arranged in a straight line along the length direction of the bottom mold 100 and are divided into 2n rows, where n is an integer greater than or equal to 1. The distances between adjacent feed holes 110 are substantially the same. Figure 2 As shown in , there are four rows of feed holes 110 in total. At the same time, near the area where the four rows of feed ports 110 are located, four threaded holes 120 and two first positioning pin holes 130 are also opened on the bottom mold 100 along its own thickness direction. The four threaded holes 120 are distributed at both ends of the length direction of the four rows of feed holes 110. The two first positioning pin holes 130 are distributed at both ends of the length direction of the four rows of feed holes 110 and are not on the same side. In addition, a number of forming columns 140 are also provided on the bottom mold 100. The forming column 140 is in the shape of a quadrangular prism as a whole and is also made of hard metal materials such as alloy steel. The axial length direction of the forming column 140 is consistent with the thickness direction of the bottom mold 100, and one end thereof is connected to the surface of one side of the bottom mold 100 between the four adjacent feed holes 110 at the position of the middle two rows of feed holes 110, and the four edge areas of the length direction of the forming column 140 overlap with the through areas of the four feed holes 110. The plurality of molding columns 140 are arranged in a straight line along the length direction of the bottom mold 100, and the distance between two adjacent molding columns 140 is substantially the same. The molding columns 140 arranged in a straight line constitute one of the components for forming the hollow cavity after the flat ceramic membrane is extruded.

[0032] The die 200 is rectangular in shape as a whole and is made of hard metal materials such as alloy steel. Four countersunk holes 210 and two second locating pin holes 220 are provided on the die 200 along its thickness direction. When the die 200 and the bottom die 100 are combined, the length directions of the two overlap, and the positions of the four countersunk holes 210 and the two second locating pin holes 220 overlap with the four threaded holes 120 and the two first locating pin holes 130 respectively. Thus, after the countersunk holes 210 and the threaded holes 120 are loaded with the matching bolts 300, the die 200 and the bottom die 100 are combined into a whole in a detachable manner, and a seal is formed at the joint surface of the die 200 and the bottom die 100 to prevent material leakage. When a matching locating pin 400 is set in the first locating pin hole 130, the matching relationship between the second locating pin hole 220, the first locating pin hole 130 and the locating pin 400 is used to achieve rapid positioning between the die 200 and the bottom die 100. At the same time, a first waist-shaped hole 230 and a second waist-shaped hole 240 are provided on the die 200 along its thickness direction. Figure 4 As shown in . The axial center direction of the first waist-shaped hole 230 and the second waist-shaped hole 240 and the through direction of the feed hole coincide, and the length and width of the second waist-shaped hole 240 are respectively smaller than the length and width of the first waist-shaped hole 230. As a result, a limiting step is formed between the first waist-shaped hole 230 and the second waist-shaped hole 240. When the concave mold 200 and the bottom mold 100 are combined, the first waist-shaped hole 230 is adjacent to the bottom mold 100.

[0033] In order to reduce the cost of mold replacement in this embodiment, the flat ceramic film extrusion molding mold also includes a core mold 500. Figure 5As shown in . The core mold 500 is made of hard metal materials such as alloy steel, and includes a first waist-shaped portion 510 and a second waist-shaped portion 520 along its own thickness direction. The length, width and height of the first waist-shaped portion 510 are respectively the same as the length, width and axial depth of the first waist-shaped hole 230. The length, width and height of the second waist-shaped portion 520 are respectively the same as the length, width and depth of the second waist-shaped hole 240. As a result, a positioning step is formed on the outer wall of the first waist-shaped portion 510 and the second waist-shaped portion 520, and the positioning step cooperates with the limiting step formed by the first waist-shaped hole 230 and the second waist-shaped hole 240. The thickness of the core mold 500 is the same as the sum of the axial depths of the first waist-shaped hole 230 and the second waist-shaped hole 240, and is greater than or equal to the axial length of the forming column 140, for example, the axial length of the forming column 140 is 2 / 3 to 9 / 10 of the thickness of the core mold 500. At the same time, a first flow channel 530 and a second flow channel 540 that are continuously connected are opened on the core mold 500 along its own thickness direction. The length and width of the first flow channel 530 adjacent to the bottom mold 100 (inlet end) are greater than the length and width of the area where the four rows of feed holes 110 are located. The length and width of the second flow channel 540 away from the bottom mold 100 (outlet end) are slightly less than or equal to the width and thickness of the flat ceramic membrane. Preferably, the internal dimensions of the first flow channel 530 can also be designed to be uniform in size to reduce the difficulty of processing. Similarly, the internal dimensions of the second flow channel 540 can also be designed to be uniform in size to reduce the difficulty of processing. When the core mold 500, the concave mold 200 and the bottom mold 100 are combined, the first flow channel 530 of the core mold 500 is adjacent to the bottom mold 100, and the core mold 500 is arranged in a combined cavity formed by the first waist-shaped hole 230 and the second waist-shaped hole 240, and when the concave mold 200 and the bottom mold 100 are fixed by bolts 300, the core mold 500 is clamped and sealed by the concave mold 200 and the bottom mold 100 at the same time, and the end surface of the core mold 500 away from the bottom mold 100 is roughly flush with the surface of the concave mold 200. At the same time, the molding column 140 is located in the combined cavity of the first flow channel 530 and the second flow channel 540. The gap between the inner wall of the first flow channel 530 and the second flow channel 540 and the outer wall of the molding column 140 and between adjacent molding columns 140 is the flow molding channel of the mud in the flat ceramic film extrusion molding die formed by the core mold 500, the concave mold 200 and the bottom mold 100. When the mud material is extruded from one end surface of the core mold 500, a flat ceramic membrane support body having a plurality of parallel hollow cavities is formed.

[0034] In this embodiment, the stability of the core mold directly affects the quality of the flat ceramic membrane. Therefore, when the flat ceramic membrane extrusion molding die affects the quality of the flat ceramic membrane due to wear, the core mold part that has been in contact with the clay for a long time can be directly replaced, and the core mold and the concave mold part can be replaced later according to the actual use. Compared with the original mold, it does not need to be replaced as a whole, and the relative cost is lower.

[0035] In this embodiment, in order to reduce the resistance of the slurry when it enters the first flow channel 530 from the feed hole 110, one end of the molding column 140 connected to the bottom mold 100 is provided with four guide grooves 141 along the axial length direction of the molding column 140. Figure 6 The four guide grooves 141 correspond to the four feed holes 110 respectively, and the inner wall surface of the guide groove 141 is flush with the inner wall surface of the feed hole 110, that is, the groove edge of the guide groove 141 does not block the feed hole 110, which is conducive to smooth discharge.

[0036] In this embodiment, in order to reduce the resistance of the mud when it flows in the first flow channel 530 and the second flow channel 540, the corners of the inner walls of the first flow channel 530 and the second flow channel 540 are both rounded. Figure 5 as shown in .

[0037] In this embodiment, in order to increase the flow rate of the mud from the feed hole 110 to the first flow channel 530, the total opening area of ​​the feed hole 110 accounts for 60~80% of the area of ​​the inlet end of the first flow channel 530 projected onto the bottom mold 100 along the axial length direction of the forming column 140, that is, the area of ​​the bottom mold 100 corresponding to the inner side of the first flow channel 530 is hollowed out as much as possible, so as to maximize the discharge area and facilitate uniform discharge.

Claims

1. A flat ceramic film extrusion molding die, characterized in that: include: A bottom mold, wherein a plurality of feed holes are provided on the bottom mold along the thickness direction thereof; the plurality of feed holes are arranged in a straight line and divided into 2n rows, where n is an integer greater than or equal to 1; A concave mold, wherein the concave mold is detachably connected to the bottom mold; the concave mold is provided with a first waist-shaped hole and a second waist-shaped hole which are continuously connected along the thickness direction thereof; the axial center directions of the first waist-shaped hole and the second waist-shaped hole and the through direction of the feed hole coincide with each other; the length and width of the first waist-shaped hole are respectively greater than the length and width of the second waist-shaped hole, and the first waist-shaped hole is adjacent to the bottom mold; A core mold, the core mold is arranged in a combined cavity of the first waist-shaped hole and the second waist-shaped hole, and is clamped by the bottom mold and the concave mold; the core mold is provided with a first flow channel and a second flow channel that are continuously connected along its own thickness direction; the first flow channel is adjacent to the bottom mold, and the length and width of the inlet end thereof are greater than the length and width of the area where the feed hole is located; the length and width of the outlet end of the second flow channel are less than or equal to the width and thickness of the flat ceramic membrane; Molding columns, several of which are arranged in a straight line in the combined cavity of the first flow channel and the second flow channel; one end of the molding column in the axial length direction is connected to the surface of one side of the bottom mold between the four adjacent feed holes in the two middle rows of feed holes; the gaps between the molding columns and between the outer walls of the molding columns and the inner walls of the first flow channel and the second flow channel are the flow molding channels of the mud in the flat ceramic membrane extrusion molding mold.

2. The flat ceramic membrane extrusion molding die according to claim 1, characterized in that: n is 1 or 2.

3. The flat ceramic membrane extrusion molding die according to claim 1, characterized in that: The distances between adjacent forming columns are equal.

4. The flat ceramic membrane extrusion molding die according to claim 1, characterized in that: The molding column is in the shape of a quadrangular prism as a whole, and the four edge regions in the length direction thereof overlap with the through regions of the four feeding holes.

5. The flat ceramic membrane extrusion molding die according to claim 4, characterized in that: One end of the forming column connected to the bottom mold is provided with four guide grooves along its axial length direction; the four guide grooves correspond to the four feed holes respectively; the inner wall surface of the guide groove is flush with the inner wall surface of the feed hole.

6. The flat ceramic membrane extrusion molding die according to claim 1, characterized in that: The corners of the inner walls of the first flow channel and the second flow channel are both rounded transitions.

7. The flat ceramic membrane extrusion molding die according to claim 1, characterized in that: The total opening area of ​​the feed holes accounts for 60-80% of the area of ​​the inlet end of the first flow channel projected onto the bottom mold along the axial length direction of the molding column.

8. The flat ceramic membrane extrusion molding die according to claim 1, characterized in that: The ratio of the axial length of the molding column to the thickness of the core mold is 2:3-1:

1.

9. The flat ceramic membrane extrusion molding die according to any one of claims 1 to 8, characterized in that: Matching positioning pins are arranged between the bottom die and the concave die.

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